A 180° protractor is a semi-circular mathematical instrument used to measure and draw angles up to 180 degrees. It typically features a baseline, a center point at the vertex, and two scales (inner and outer) marked from 0° to 180° for measuring angles clockwise or counter-clockwise. These tools are commonly made of transparent plastic but can also be constructed from materials like wood, steel, or glass.
Key Features
- Semi-circular shape.
- 180-degree scale.
- Center point
- Baseline.















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